Rev 7.1:

In the continuing quest to combat hackers, CALIB has been modified not to
write any files on the server. This resulted in
the format of the plot image being changed to SVG. Use Adobe
Illustrator or the free software, Inkscape, to manipulate the downloaded file.
If your web browser is Internet Explorer you'll simply get a png file when
you download the image

Rev 7.0: What's changed from Rev 6.0

A new calibration curve for the conversion of radiocarbon ages
to calibrated (cal) ages has been constructed and internationally
ratified to replace IntCal09 which extended from 0-50 ka cal
BP (Before Present, 0 cal BP = AD 1950). The new calibration dataset
for terrestrial samples also extends from 0-50 ka cal BP.